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Cheap flights from Idaho to London from £219

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LON
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Idaho to London

Keep the following information in mind while searching for Idaho to London flight deals. Data was last updated 31 October 2025.

Round-trip from

£429

One-way from

£219

Popular in

June

Cheapest in

October

Average price

£502
Virgin Atlantic
  • Virgin Atlantic
  • 17/2-26/2
  • 2 total stops
  • 29h 43m total
  • Idaho to London
Search Deals
13/1
  • 13/1
  • 2 total stops
  • 40h 15m total
  • Idaho to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£162 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Idaho to London

Enter your travel dates to find the best prices.

Cheapest flights from Idaho to London
Explore the most affordable flight options available from Idaho to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 October 2025.

Mon 1/1215:54BOI - LHR
1 stop17h 56mDelta
Wed 10/1206:20LHR - BOI
2 stops21h 00mDelta
Deal found 30/10£449
Wed 5/1112:51GEG - LHR
1 stop14h 49mMultiple Airlines
Wed 19/1106:20LHR - GEG
2 stops17h 28mMultiple Airlines
Deal found 28/10£449
Tue 2/1205:35BOI - LHR
1 stop18h 30mVirgin Atlantic
Tue 9/1206:20LHR - BOI
2 stops19h 31mVirgin Atlantic
Deal found 29/10£449
Wed 5/1111:20GEG - LHR
1 stop15h 10mDelta
Wed 19/1106:20LHR - GEG
2 stops20h 38mDelta
Deal found 30/10£449
Wed 19/1111:42BOI - LHR
1 stop15h 48mDelta
Wed 26/1108:40LHR - BOI
2 stops20h 47mDelta
Deal found 29/10£450
Wed 12/1106:00GEG - LHR
1 stop20h 00mDelta
Wed 26/1106:30LHR - GEG
2 stops21h 33mDelta
Deal found 29/10£450
Wed 12/1106:00GEG - LHR
2 stops18h 45mDelta
Wed 3/1206:30LHR - GEG
2 stops21h 40mDelta
Deal found 28/10£453
Wed 12/1113:16GEG - LHR
1 stop14h 24mKLM
Wed 3/1210:45LHR - GEG
1 stop15h 52mKLM
Deal found 28/10£455
Sat 15/1115:33GEG - LHR
2 stops20h 37mDelta
Wed 26/1112:20LHR - GEG
1 stop16h 41mDelta
Deal found 29/10£458
Thu 27/1107:05GEG - LHR
1 stop19h 25mDelta
Thu 4/1206:20LHR - GEG
2 stops17h 20mDelta
Deal found 30/10£467
Tue 11/1105:10GEG - LHR
2 stops18h 00mUnited Airlines
Tue 25/1106:35LHR - GEG
2 stops24h 54mUnited Airlines
Deal found 29/10£470
Tue 28/1016:05GEG - LHR
2 stops30h 50mUnited Airlines
Thu 6/1106:35LHR - GEG
2 stops36h 07mUnited Airlines
Deal found 28/10£473

Cheapflights Fare Finder

 
Customise your flight search to find flights from Idaho to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 31 October 2025.
Use the filters below to find and compare flights from Idaho to London that are best for you.

Fly from

Idaho

Fly to

London

Route

Depart

Return

Price

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/12

05:35-07:05

1 stop18h 30m

London Heathrow

Tue 9/12

06:20-18:51

2 stops19h 31m

£449

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Wed 19/11

08:45-10:15

2 stops18h 30m

London Heathrow

Wed 26/11

08:40-22:27

2 stops20h 47m

£454

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 2/12

09:00-10:30

1 stop18h 30m

London Heathrow

Tue 9/12

12:20-18:51

1 stop13h 31m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 17/2

10:15-10:00

1 stop15h 45m

London Heathrow

Tue 3/3

06:20-16:10

2 stops17h 50m

£455

BoiseLondon

BOI - LHR

BOILHR

Boise Air Term. Gowen Fld

Tue 17/2

14:00-12:50

1 stop15h 50m

London Heathrow

Fri 27/2

06:20-18:25

2 stops19h 05m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

13:16-11:40

1 stop14h 24m

London Heathrow

Wed 3/12

10:45-18:37

1 stop15h 52m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 17/2

13:00-12:50

1 stop15h 50m

London Heathrow

Wed 4/3

06:20-18:46

2 stops20h 26m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Wed 12/11

13:10-10:30

1 stop13h 20m

London Heathrow

Wed 3/12

11:05-20:10

1 stop17h 05m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Sun 15/2

11:15-10:30

1 stop15h 15m

London Heathrow

Fri 6/3

06:20-21:03

2 stops22h 43m

£455

SpokaneLondon

GEG - LHR

GEGLHR

Spokane

Tue 24/2

11:15-10:30

1 stop15h 15m

London Heathrow

Tue 10/3

06:20-16:10

2 stops16h 50m

£455

Flights are sorted by cheapest return flights first.

Deals found on 28/10

Showing 1-10 of 48 results
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Best time to book a flight from Idaho to London

Have a flexible travel schedule? Discover the best time to fly to London from Idaho with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to London

What is the cheapest month to book a flight from Idaho to London?

Currently, July is the cheapest month in which you can book a flight from Idaho to London (average of £464). Flying from Idaho to London in June is currently the most expensive (average of £823). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to LON?

Find hourly flight availability from Idaho to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 31 October 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho to London in the evening. If you’re flexible enough to do this you can expect to save up to 55% on your trip compared to booking a flight at midday.

How much does it cost for a return flight from Idaho to London?

Related info for your journey

Find useful and relevant information for your journey from Idaho to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Idaho to London?

    A quick flight from Idaho to London can take about 18h 30m. Virgin Atlantic provides one of the quickest options available for as low as £449. The distance from Idaho to London is about 4829 mi.

  • What are the cheapest airlines to fly from Idaho to London one-way?

    The cheapest airline one-way is Air New Zealand, with whom users have recently found tickets for as low as £301. However, be on the lookout for offers from United Airlines and Icelandair, as they are both options that can get you from Idaho to London for a low price.

  • What are the most popular routes from Idaho to London?

    While some choose either Spokane - London Gatwick or Boise Air Term. Gowen Fld - London Heathrow, Spokane - London Heathrow is the most popular route from Idaho to London.

  • Can I find deals for flights from Idaho to London that include hotel bookings?

    Yes. In addition to deals on Idaho to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Idaho to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to London.

  • Can I find deals for business class flights from Idaho to London?

    Yes. Cheapflights offers flight deals from Idaho to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to London?

    Currently, July is the cheapest month in which you can book a flight from Idaho to London (average of £464). Flying from Idaho to London in June is currently the most expensive (average of £823). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

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Ilford
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Deal
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Alternative routes for Idaho to London

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How does Cheapflights help users find flights from Idaho to London?

When you search for this flight from Idaho to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Millions of users choose and trust Cheapflights to book the best flight deals from Idaho to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Idaho to London flexibly with Cheapflights today.

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